Design of dual-polarized triple-band concentric annular-ring microstrip patch antenna for GPS applications

Abstract

A triple-frequency operated concentric annular ring microstrip antenna which is single fed is presented. The proposed antenna with three concentric annular rings and two symmetrical notches on its outer ring and having a cross slot in its ground surface shows triple band at resonance frequency 1.22760, 1.57542, and 2.18 GHz, respectively. At the first two bands (GPS L2 and GPS L1), circular polarization characteristic is observed and the third band observes linear polarization finding its application in Universal Mobile Telecommunication System (UMTS). The complete dimension of the antenna designed and fabricated is only 51.6 × 51.6 × 1.6 mm3. Experimental results depict the proposed antenna gain of 3.31, 3.55, and 3.50 dBi in three bands, respectively, and closely matches with the theoretical results.

A Wideband and Wide Axial Ratio Bandwidth Circularly Polarized Antenna Loaded with Circular Ring Slot

“…The circular polarizations are often obtained by accepting methodology of truncated microstrip antenna of square shape having single feed four slits [3]. The foremost good thing about single feed CP microstrip antennas [4]- [6] is its conventional structure that does not need an external polarizer. To analyze it concisely, lesser board area is required than that in case of dual feed CP microstrip antennas.…”